Fixing Outlook Error 0x8004010f: Step-by-Step Guide - How to Solve SSL Certificate Errors in Windows Defender-Microsoft Teams on Ubuntu: Common Issues and Fixes

Updated 2026-06-14 17:59:05office-tools
Fixing Outlook Error 0x8004010f: Step-by-Step Guide - How to Solve SSL Certificate Errors in Windows Defender-Microsoft Teams on Ubuntu: Common Issues and Fixes
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.